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A porism concerning cyclic quadrilaterals - MaRDI portal

A porism concerning cyclic quadrilaterals (Q2260759)

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A porism concerning cyclic quadrilaterals
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    A porism concerning cyclic quadrilaterals (English)
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    12 March 2015
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    Summary: We present a geometric theorem on a porism about cyclic quadrilaterals, namely, the existence of an infinite number of cyclic quadrilaterals through four fixed collinear points once one exists. Also, a technique of proving such properties with the use of pseudounitary traceless matrices is presented. A similar property holds for general quadrics as well as for the circle.
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    cyclic quadrilaterals
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